Barrel. Anything else is like trying to turn a Chevette into a Corvette.

Strengths:

Inexpensive

Weaknesses:

Limited upgradeability, and a little loud.

Review:

I have four of these guns, 2 are the old style and 2 are the new '02 style. I have them both in the vertical and bottomline versions. The vertical versions are cool to use with a 7-oz tank because you use the tank as the forward grip (the small tank is easy to grip) kinda uzi style or something. These guns are used as my backup, but mostly for my numerous friends that don't have a marker of their own. I started with two guns as a $25 purchase from a friend that just didn't want them anymore. Then I got one on ebay, then I ordered another for $24.95. The guns are tanks. I have not seen any other guns go through so much abuse and still be fairly accurate. I have upgraded some barrels, with good results but as far as adding an expansion chamber, a new bolt, and a powerfed hopper, this gun will never be an Angel or an Intimidator. The only things I have had to do to the markers is routine maintenance. (O-rings and ball detents) One of my favorite things is to consistently hit friends that have hundreds of dollars tied up in E-markers and autocockers. Man, do they get pissed when a 20 dollar gun keeps kicking their ass. I have never had a problem with one of these guns on the field. Sure they might not shoot as fast, and you might chop once in a while, but it sure beats the feeling you get when your 800 dollar marker is doing strange things and you don't know what to do to fix it.

Conclusion:

Great beginner gun. If you want to move on to something better, GREAT, use this as a loaner and a backup. Easy to maintain and simple to fix. Nothing worth a crap beats this price.